Grinding Tool

ABSTRACT

A grinding tool, in particular a diamond cup wheel, includes at least one main body, which has at least one connection region and at least one contact region, the contact region at least substantially completely surrounding the connection region when viewed in at least one main extension plane of the main body. The grinding tool further includes a plurality of grinding elements, which are arranged on the main body. The main body delimits a plurality of suction openings which, when viewed along a circumferential direction of the main body, are each arranged between at least two grinding elements of the plurality of grinding elements.

PRIOR ART

There has already been proposed a grinding tool having at least one main body that comprises at least one connection region and at least one contact region, wherein the contact region surrounds the connection region at least substantially completely as viewed in at least one plane of main extent of the main body, and having a multiplicity of grinding elements that are arranged on the main body, wherein the main body delimits a multiplicity of suction extraction openings.

DISCLOSURE OF THE INVENTION

The invention is based on a grinding tool, in particular a diamond cup wheel, having at least one main body that comprises at least one connection region and at least one contact region, wherein the contact region surrounds the connection region at least substantially completely as viewed in at least one plane of main extent of the main body, and having a multiplicity of grinding elements that are arranged on the main body, wherein the main body delimits a multiplicity of suction extraction openings.

It is proposed that the suction extraction openings be arranged in each case between at least two grinding elements of the multiplicity of grinding elements, as viewed along a circumferential direction of the main body. Preferably, the main body has at least one central axis extending, in particular centrally, through the connection region. The central axis is preferably at least substantially perpendicular to the plane of main extent of the main body. Preferably, the central axis is realized as an axis of rotational symmetry of the main body. In particular, the central axis is realized as an axis of rotation about which the grinding tool can be driven in rotation. A “plane of main extent” of a component, in particular of the main body, is to be understood to mean, in particular, a plane that is parallel to a largest lateral surface of a smallest notional cuboid that only just completely encloses the component. “Substantially perpendicular” is to be understood to mean, in particular, an alignment of a straight line or of a plane, in particular or the central axis, relative to a further straight line or a further plane, in particular the plane of main extent of the main body, the straight line or the plane and the further straight line or the further plane, in particular as viewed in a plane of projection, enclosing an angle of 90° and the angle having a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2°. Preferably, the circumferential direction extends in the plane of main extent of the main body. Preferably, the circumferential direction is aligned, within the plane of main extent of the main body, along a circular path of which the mid-point is located on the central axis. Preferably, the suction extraction openings and/or the grinding elements are arranged in a symmetrically distributed manner around the central axis, in particular in groups, preferably as viewed in the plane of main extent of the main body. Preferably, inner surfaces of the main body, each of which delimits one of the suction extraction openings, span at least one maximum angular range around the central axis, as viewed in the plane of main extent of the main body, the grinding elements being in particular arranged outside the maximum angular ranges of the inner surfaces. Preferably, the suction extraction openings delimited by the main body are all realized identically. Alternatively, the suction extraction openings are realized differently from each other, in particular in their geometric shape, in a maximum cross-sectional area or the like. It is conceivable for the grinding elements all to be realized identically. Particularly preferably, the grinding tool has a greater number or grinding elements than a number of suction extraction openings.

In particular, the grinding elements are designed to remove material from a workpiece, in particular from a workpiece on which work is performed with the grinding tool and preferably at least partially in contact with the contact region. Preferably, the grinding elements, as viewed in the plane of main extent of the main body, individually have a cross-sectional area of at least 120 mm², preferably at least 150 mm² and particularly preferably at least 170 mm². Preferably, the grinding elements, as viewed in the plane of main extent of the main body, individually have a cross-sectional area of at most 300 mm², preferably at most 250 mm² and particularly preferably at most 220 mm². In particular, the grinding elements individually have a maximum extent of at most 30 mm, preferably at most 27 mm and particularly preferably at most 25 mm, along a longitudinal axis of the grinding elements or along the circumferential direction. Preferably, the grinding elements individually have a maximum extent of at most 10 mm, preferably at most 9 mm and particularly preferably at most 8.7 mm, along a transverse axis of the grinding elements or along an axis of the grinding elements that is at least substantially perpendicular to the circumferential direction. Preferably, the grinding tool has at most 15, preferably at most 12 and more preferably at most 9 grinding elements. Preferably, the grinding tool has at least more than one, preferably at least 3 and more preferably at least 9 grinding elements. Preferably, the grinding elements individually have, at least substantially parallel to the central axis, a maximum extent or at most 6 mm, preferably at most 5.7 mm and particularly preferably at most 5.5 mm. “Substantially parallel” is to be understood here to mean, in particular, an alignment of a straight line or of a plane, in particular of the maximum extent, relative to a further straight line or a further plane, in particular the central axis, the straight line or the plane having a deviation of, in particular, less than 8°, advantageously less than 5°, and particularly advantageously less than 2° with respect to the further straight line or the further plane. Preferably, the grinding elements individually have, at least substantially parallel to the central axis, a maximum extent of at least 3 mm, preferably at least 4 mm and particularly preferably at least 4.5 mm. Preferably, at least one grinding element of the multiplicity of grinding elements is realized as an inner grinding element, in particular the inner grinding element, preferably as viewed in the plane of main extent of the main body, being arranged at least partially, in particular at least substantially completely, in an inner edge region of the contact region on the main body that delimits the connection region. Preferably, at least one further grinding element of the multiplicity of grinding elements is realized as an outer grinding element, in particular the further outer grinding element, preferably as viewed in the plane of main extent of the main body, being arranged at least partially, in particular at least substantially completely, in an outer edge region of the contact region on the main body. That a component, in particular the grinding element or the further grinding element, has a property or is arranged in a region, in particular in the outer or in the inner edge region, “substantially completely” is to be understood in particular to mean that at least 95%, preferably at least 98% and particularly preferably at least 99%, of a mass, of a volume and/or of an area of the component, in particular as viewed in a plane of projection, have/has the property or are/is arranged in the region. In particular, the outer edge region, preferably as viewed in the plane of main extent of the main body, extends within a minimum radial distance from an outer edge of the grinding tool, in particular of the contact region, the minimum radial distance being at most 20 mm, preferably at most 15 mm and particularly preferably at most 12 mm. Preferably, the inner edge region, preferably as viewed in the plane of main extent of the main body, extends within a minimum radial distance from an inner edge of the contact region that delimits the connection region, the minimum radial distance being at most 20 mm, preferably at most 15 mm and more preferably at most 12 mm. In particular, the grinding element realized as an inner grinding element, in particular as viewed in the plane of main extent of the main body, has a minimum distance from the central axis that corresponds to a value from a value range of from 25 mm to 55 mm, preferably from 35 mm to 45 mm and particularly preferably from 37 mm to 43 mm. It is conceivable for the further grinding element realized as an outer grinding element to have at least one lateral surface, the further grinding element being arranged in such a manner that the lateral surface of the further grinding element is arranged in a plane with an outer edge of the main body, in particular of the contact region, as viewed in particular from the central axis. Preferably, the grinding elements are realized as diamond grinding elements. In particular, the grinding elements individually, at least on a side of the grinding elements that faces away from the contact surface, comprise a multiplicity of diamond particles. Preferably, the grinding elements have a curved shape. It is conceivable for the grinding elements, in particular as viewed in the plane of main extent of the main body, to have at least one lateral surface, preferably two lateral surfaces having a curvature corresponding to a curvature of a circle around the central axis, the circle having a radius corresponding to a minimum radial distance of the lateral surface from the central axis. Alternatively, it is conceivable for the grinding elements, in particular as viewed in the plane of main extent of the main body, to be realized at least substantially rectilinearly, in particular the grinding elements having at least one lateral surface that is at least partially, in particular at least for the most part, at least substantially perpendicular to a maximum diameter of the main body, in particular of the contact region.

Particularly preferably, the suction extraction openings are arranged, in particular at least substantially completely, within the contact region. In particular, the suction extraction openings are designed to convey dust, removed during working on a workpiece by means of the grinding elements, away from a work region of the grinding tool. Particularly preferably, the suction extraction openings are realized as dust suction extraction openings. Preferably, the work region is arranged on a side of the main body, in particular of the contact region, on which the grinding elements are arranged. Preferably, the connection region and/or the contact region, as viewed in the plane of the main extent of the main body, are/is realized in the shape of a circular ring and, in particular, are centered around the central axis. In particular, the main body, in particular the contact region and the connection region, is realized in one piece. “In one piece” is to be understood to mean, in particular, connected in a materially bonded manner such as, for example, by a welding process and/or an adhesive process and, particularly advantageously, formed-on, as by being produced from a casting and/or by being produced in a single or multi-component injection process. Preferably, the main body within the connection region is at least partially cup-shaped, in particular the main body within the connection region around the central axis delimiting at least one recess for fastening the grinding tool to a grinding tool machine. In particular, the recess delimited by the connection region, in particular as viewed in the plane of main extent of the main body, is realized in a circular and/or cylindrical shape, in particular a maximum diameter of the recess having a value from a value range of from 10 mm to 40 mm, preferably from 20 mm to 30 mm and particularly preferably from 22 mm to 24 mm. Preferably, the main body has at least one contact surface, which extends over the contact region, on a side that in particular faces away from the connection region. Preferably, the connection region has a maximum diameter of at least 50 mm, preferably at least 65 mm and more preferably at least 75 mm. In particular, the contact region has a maximum radial width around the central axis of at least 15 mm, preferably at least 20 mm and more preferably at least 22 mm. Preferably, the grinding elements are arranged over the contact surface on the main body. Preferably, the main body has a maximum thickness having a value from a value range of from 1 mm to 10 mm, preferably 2 mm to 6 mm and particularly preferably 3.5 mm to 4.5 mm within the contact region, in particular at least substantially perpendicular to the plane of main extent of the main body.

Preferably, at least one other grinding element of the multiplicity of grinding elements is realized as a radial grinding element, in particular the other grinding element having a longitudinal axis that is at least substantially parallel to a transverse axis and/or the maximum diameter of the main body. In particular, the transverse axis intersects central axis, in particular in the plane of main extent of the main body. Preferably, the longitudinal axis of the other grinding element is at least substantially perpendicular to the circumferential direction and/or to a longitudinal axis of the grinding element realized as an outer grinding element and/or of the further grinding element realized as an inner grinding element. In particular, the other grinding element is arranged at least partially within the outer edge region and/or the inner edge region on the main body, in particular in the contact region. Preferably, the other grinding element has a radial extent that is at least equal to, or greater than, the suction extraction openings, in particular along a maximum diameter of the main body. The design of the grinding tool according to the invention makes it possible to achieve an advantageously high rate of extraction of dust by suction when work is being performed on a workpiece by means of the grinding tool. An advantageously high rate of material removal by the grinding tool becomes possible. In particular, the arrangement of the suction extraction openings and grinding elements makes it possible to achieve advantageously low production costs for the grinding tool.

It is additionally proposed that the multiplicity of grinding elements be arranged as groups of grinding elements on the main body, and that the suction extraction openings be arranged in each case between two groups of grinding elements as viewed along the circumferential direction of the main body. In particular, at least two grinding elements form a group. Preferably, the groups individually are formed in each case by grinding elements arranged between two suction extraction openings on the main body that are arranged in succession as viewed along the circumferential direction. Preferably, the groups individually are in each case composed of at least one inner grinding element and at least one outer grinding element, which are arranged together between two suction extraction openings, in particular as viewed along the circumferential direction. Particularly preferably, the grinding tool has three, four or five groups of grinding elements. Preferably, a group of grinding elements has an arrangement of two or more grinding elements, each of the grinding elements having a minimum distance from at least one other, in particular directly adjacent, grinding element that corresponds at most to a maximum extent of the grinding element. In particular, the minimum distance between directly adjacent grinding elements of a group is in particular at most 26 mm, preferably at most 24 mm and particularly preferably at most 20 mm. In particular, the grinding elements of a group of grinding elements have at least partially the same function, the same design and/or the same arrangement, in particular an at least partially same arrangement along the circumferential direction relative to the suction extraction openings. In particular, the groups of grinding elements each individually have a number of two to five grinding elements. It is also conceivable, however, for the groups of grinding elements each individually to have more than five grinding elements An advantageously high rate of extraction of dust by suction can be achieved when work is being performed on a workpiece by means of the grinding tool. An advantageously high rate of material removal by the grinding tool becomes possible.

It is furthermore proposed that a ratio of a minimum distance of the suction extraction openings delimited by the main body from a, in particular the aforementioned, central axis of the main body, to a, in particular the aforementioned, maximum diameter of the contact region is at least 0.05, preferably at least 0.2 and particularly preferably at least 0.34. Particularly preferably, the ratio of the minimum distance to the maximum diameter of the contact region has a value from a value range of from 0.1 to 0.4, preferably from 0.2 to 3.0 and particularly preferably from 0.34 to 3.7. Preferably, the maximum diameter of the contact region and/or the minimum distance of the suction extraction openings from the central axis is at least substantially parallel to the plane of main extent of the main body. Preferably, the maximum diameter of the contact region corresponds to a value from a value range of from 120 mm to 125 mm. It is also conceivable, however, for the maximum diameter of the contact region to correspond to a value from a value range of from 100 mm to 105 mm, 110 mm to 115 mm, 145 mm to 155 mm, or 175 mm to 185 mm. Particularly preferably, a radial distance of an inner, in particular innermost, surface of the main body, that faces away from the central axis and delimits a suction extraction opening, from the central axis is at least 35 mm, preferably at least 40 mm and particularly preferably at least 42 mm. Preferably, a minimum radial distance from the suction extraction openings to the central axis of the main body is greater than a minimum radial distance from an inner grinding element to the central axis. Preferably, a maximum radial distance from the suction extraction openings to the central axis of the main body is less than a maximum radial distance from an outer grinding element to the central axis. An advantageous arrangement of the suction extraction openings on the main body becomes possible, in particular in order to achieve an advantageously high suction extraction rate of the grinding tool. Advantageously, an arrangement of the suction extraction openings in a region of the main body in which the grinding elements are arranged, in particular outside the connection region, becomes possible.

It is additionally proposed that a ratio of a maximum longitudinal extent of the suction extraction openings delimited by the main body to a, in particular the aforementioned, maximum diameter of the contact region is at most 0.9, preferably at most 0.5 and particularly preferably at most 0.3. Particularly preferably, the ratio of the maximum longitudinal extent of the suction extraction openings to the maximum diameter of the contact region is at least 0.05, preferably at least 0.1 and more preferably at least 0.15. Very particularly preferably, the ratio of the maximum longitudinal extent of the suction extraction openings to the maximum diameter of the contact region is a value from a value range of between 0.15 and 0.25. Preferably, the maximum longitudinal extent is at least substantially perpendicular to the central axis, to the minimum distance of the suction extraction openings from the central axis and/or to a radial extent of the main body. Preferably, the maximum longitudinal extent of the suction extraction openings is at least substantially parallel to the plane of main extent of the main body. Preferably, the maximum longitudinal extent of the suction extraction openings is at least 13 mm, preferably at least 20 mm and more preferably at least 24 mm. In particular the maximum longitudinal extent of the suction extraction openings is at most 60 mm, preferably at most 50 mm and more preferably at most 30 mm. Preferably, the suction extraction openings, in particular as viewed in the plane of main extent of the main body, have a maximum transverse extent of at least 9 mm, preferably at least 10 mm and particularly preferably at least 11.8 mm. Preferably, the suction extraction openings, in particular as viewed in the plane of main extent of the main body, have a maximum transverse extent of at most 30 mm, preferably at most 20 mm and particularly preferably at most 13 mm. In particular, the maximum transverse extent is at least substantially parallel to the maximum diameter of the grinding tool, in particular of the main body and/or of the contact region, and/or at least substantially perpendicular to the circumferential direction or the longitudinal extent. For example, the suction extraction openings delimited by the main body, in particular the inner surfaces of the main body that delimit the suction extraction openings, have an at least partially round, elliptical or lenticular contour as viewed in the plane of main extent of the main body. It is also conceivable for the contour of the suction extraction openings delimited by the main body, in particular of the inner surfaces of the main body that delimit the suction extraction openings, to have a differently realized contour as viewed in the plane of main extent of the main body, in particular the contour being realized as a closed line segment, which comprises two sides that are of equal length and parallel to each other and that in each case are connected at their ends, which in each case are aligned in the same direction, via a semicircular side. In particular, the inner surfaces of the main body that delimit suction extraction openings are at least substantially perpendicular to the plane of main extent of the main body or are inclined with respect to the plane of main extent of the main body. Preferably, the suction extraction openings individually have a longitudinal axis along which the maximum longitudinal extent is realized. Preferably, the suction extraction openings are arranged in such a manner that the longitudinal axis, in particular as viewed in the plane of main extent of the main body, is at least substantially parallel or at least substantially perpendicular to the maximum diameter of the main body, in particular of the contact region. Alternatively, it is conceivable for the suction extraction openings to be arranged in such a manner that the longitudinal axis is transverse, in particular with an angle from an angular range of from 8° to 82°, to the maximum diameter of the main body. Alternatively or additionally, it is conceivable for the main body to delimit suction extraction openings that are realized differently from each other, the suction extraction openings differing in a size and/or an arrangement of the main body. The suction extraction openings may extend over an advantageously large portion of a circumference of the main body, in particular in order to achieve an advantageously high rate of extraction by suction by the grinding, tool. An advantageously small number of suction extraction openings becomes possible, irrespective of a change in the suction extraction rate of the grinding tool, in particular compared to a grinding tool having an equal number or suction extraction openings.

It is further proposed that the suction extraction openings delimited by the main body, in particular as viewed in the plane of main extent of the main body, individually have a cross-sectional area of at least 180 mm², preferably at least 220 mm², particularly preferably at least 250 mm², and very preferably at least 265 mm². In particular, the suction extraction openings delimited by the main body, in particular as viewed in the plane of main extent of the main body, individually have a cross-sectional area of at most 1000 mm², preferably at most 700 mm², particularly preferably at most 400 mm² and very particularly preferably at most 370 mm². Preferably, a ratio of a total cross-sectional area of the suction extraction openings to a total area of the contact region, in particular the contact surface, is at least 0.1, preferably at least 0.15 and particularly preferably at least 0.2. Preferably, a ratio of a total cross-sectional area of the suction extraction openings to a total cross-sectional area of the main body in the plane of main extent of the main body is at least 0.075, preferably at least 0.09 and particularly preferably at least 0.16. Preferably, the cross-sectional areas of the suction extraction openings in the plane of main extent of the main body are surrounded by the inner surfaces of the main body that delimit the suction extraction openings. Preferably, the cross-sectional areas in the plane of main extent of the main body individually each have at least one basic shape, which is delineated in particular by the contour of the suction extraction openings, in particular of the inner surfaces. Preferably, the basic shape of the cross-sectional surfaces is conical, in particular circular, elliptical and/or lenticular. An advantageously high suction extraction rate of the individual suction extraction openings can be achieved. Advantageously, clogging of the suction extraction openings with dust can be at least substantially delayed and/or prevented. An advantageously high suction extraction rate of the grinding tool can be achieved. An advantageously small number of suction extraction openings becomes possible, irrespective of a change in the suction extraction rate of the grinding tool, in particular compared to a grinding tool having an equal number of suction extraction openings.

It is furthermore proposed that the main body delimit at most five suction extraction openings. Preferably, the main body delimits at least three suction extraction openings. In particular, the main body delimits exactly three, exactly four or exactly five suction extraction openings. An advantageously rapid process of production of the grinding tool becomes possible, in particular since it is possible to achieve an advantageously small number of suction extraction openings delimited by the main body. Low production costs for the grinding tool thus become possible. An advantageously high degree of robustness against deformation and/or damage to the grinding tool becomes possible, in particular because a high thickness of material can be realized between the suction openings.

It is additionally proposed that the suction extraction openings delimited by the main body be arranged in the contact region and, as viewed in the plane of main extent of the main body, extend over at least 30%, preferably at least 40% and particularly preferably at least 50%, of a maximum radial extent of the contact region, in particular from a side of the contact region that delimits the connection region to an outer edge of the contact region. In particular, the suction extraction openings delimited by the main body extend, as viewed in the plane of main extent of the main body, over at most 95%, preferably at most 90% and particularly preferably at most 85%, of the maximum radial extent of the contact region. An advantageously high suction extraction rate can be realized by the suction extraction openings in the contact region. An advantageously high degree of robustness against deformation and/or damage to the grinding tool can be achieved, in particular because it is possible to dispense with suction extraction openings in the connection region.

It is further proposed that the suction extraction openings delimited by the main body, as viewed in the plane of main extent of the main body, are arranged spaced apart from each other around a central axis of the main body over an angular range of at least 45°, preferably at least 55° and particularly preferably at least 65°. In particular, the angular range over which the suction extraction openings delimited by the main body are arranged spaced apart from each other, as viewed in the plane of main extent of the main body, is at most 120°, preferably at most 110° and particularly preferably at most 100°. Preferably, the angular range around the central axis spanned by the individual suction extraction openings extends over at least 14°, preferably at least 20° and more preferably over at least 25°. In particular, the angular range around the central axis spanned by the individual suction extraction openings extends over at most 80°, preferably at most 65° and particularly preferably at most 50°. An advantageously high degree of stability of the main body can be achieved. An advantageously high degree of robustness against deformation and/or damage to the grinding tool can be achieved.

It is furthermore proposed that an individual group of grinding elements comprise at most five, preferably at most four and more preferably at most three, grinding elements. Preferably, each group of grinding elements comprises the same number of grinding elements, which in particular are realized identically in their arrangement with respect to each other. It is also conceivable for an individual group of grinding elements to have more than five grinding elements. Advantageously low production costs for the grinding tool become possible, in particular since it is possible to achieve an advantageously small number of grinding elements per individual group.

It is additionally proposed that an individual group of grinding elements have at least one inner grinding element, in particular the aforementioned grinding element, arranged in an inner edge region of the contact region on the main body, in particular the aforementioned inner edge region delimiting the connection region, wherein a maximum of six, preferably a maximum of four, inner grinding elements are arranged on the main body. Preferably, each of the groups of grinding elements has at least one inner grinding element. Advantageously low production costs for the grinding tool become possible, in particular as a result of an advantageously small number of inner grinding elements.

It is further proposed that an individual group of grinding elements comprise at least one outer grinding element, in particular the aforementioned further grinding element, arranged in an, in particular the aforementioned, outer edge region of the contact region on the main body, wherein a maximum of six outer grinding elements are arranged on the main body. Preferably, each of the groups of grinding elements has at least one, in particular at least two, outer grinding elements. Advantageously low production costs for the grinding tool become possible, in particular as a result of an advantageously small number of outer grinding elements.

It is furthermore proposed that an individual group of grinding elements comprise at least two outer grinding elements and at least one inner grinding element, wherein the outer grinding elements are arranged in an outer edge region of the contact region and the inner grinding element is arranged in an inner edge region of the contact region that delimits the connection region, and wherein the inner grinding element, as viewed along the circumferential direction of the main body, is arranged, in particular at least substantially completely, between the two outer grinding elements. Alternatively, it is conceivable for the grinding elements of a group to be arranged on the main body in a staggered manner along a radial direction with respect to the central axis, wherein, in particular, the grinding elements of the group, as viewed along the radial direction, are arranged in a mutually offset manner in the circumferential direction. In particular, the arrangement of the outer grinding elements and the inner grinding element within the individual groups enables the groups to have an advantageously large working range. An advantageously balanced ratio of a material removal rate of the outer grinding elements and a material removal rate of the inner grinding elements of the grinding tool can be achieved, in particular because, during a movement of the grinding tool in the circumferential direction, the inner grinding tools cover a shorter distance around the central axis than the outer grinding elements.

It is additionally proposed that an individual group of grinding elements comprise at least one radial grinding element, in particular the aforementioned other grinding element, which is arranged in such a manner that a longitudinal axis of the radial grinding element is at least substantially parallel to a transverse axis of the main body, wherein the transverse axis intersects a central axis of the main body. Preferably, the transverse axis extends along the maximum diameter of the main body. In particular, the radial grinding element is arranged between two grinding elements, in particular two inner grinding elements, two outer grinding elements and/or one inner and one outer grinding element, of the group of grinding elements, as viewed along the circumferential direction. Preferably, each of the groups of grinding elements has at least one, in particular exactly one, radial grinding element. The radial grinding elements make it possible to work an advantageously large area around the central axis, in particular compared to another design of the grinding tool having an equal number of grinding elements. In particular, an advantageously high ratio of an area worked by means of the grinding tool and a number of grinding elements of the grinding tool becomes possible.

The grinding tool according to the invention is not intended in this case to be limited to the application and embodiment described above. In particular, the grinding tool according to the invention may have a number of individual elements, components and units that differ in number from a number stated herein, in order to fulfill an operating principle described herein. Moreover, in the case of the value ranges specified in this disclosure, values lying within the stated limits are also to be deemed as disclosed and applicable in any manner.

DRAWINGS

Further advantages are given by the following description of the drawings. The drawings show eight exemplary embodiments of the invention. The drawings, the description and the claims contain numerous features in combination. Persons skilled in the art will expediently also consider the features individually and combine them to form appropriate further combinations.

There are shown:

FIG. 1 a schematic representation of a grinding tool according to the invention, in a top view,

FIG. 2 a schematic representation of the grinding tool according to the invention, in a side view,

FIG. 3 a schematic representation of a first alternative design of a grinding tool according to the invention having four suction extraction openings, in a top view,

FIG. 4 a schematic representation of the first alternative design of the grinding tool according to the invention, in a side view,

FIG. 5 a schematic representation of a second alternative design of a grinding tool according to the invention having radially aligned grinding elements, in a top view,

FIG. 6 a schematic representation of a third alternative design of a grinding tool according to the invention having obliquely aligned inner grinding elements, in a top view,

FIG. 7 a schematic representation of a fourth alternative design of a grinding tool according to the invention having central grinding elements, in a top view,

FIG. 8 a schematic representation of a fifth alternative design of a grinding toll according to the invention having mutually staggered grinding elements, in a top view,

FIG. 9 a schematic representation of a sixth alternative design of a grinding tool according to the invention having five suction extraction openings, in a top view, and

FIG. 10 a schematic representation of a seventh alternative design of a grinding tool according to the invention having obliquely arranged inner and outer grinding elements, in a top view.

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

FIG. 1 shows a grinding tool 10 a in a plan view. Preferably, the grinding tool 10 a is realized as a diamond cup wheel. It is also conceivable, however, for the grinding tool 10 a to be of a different design that is considered appropriate by persons skilled in the art. The grinding tool 10 a has a main body 12 a, which comprises a connection region 14 a and a contact region 16 a. The contact region 16 a surrounds the connection region 14 a at least substantially completely as viewed in at least one plane of main extent 17 a of the main body 12 a. The plane of main extent 17 a of the main body 12 a is at least substantially perpendicular to a central axis 24 a of the main body 12 a (see FIG. 2). The grinding tool 10 a has nine grinding elements 36 a, 40 a, which are arranged on the main body 12 a. It is also conceivable, however, for the grinding tool 10 a to have a number of grinding elements 36 a, 40 a that is other than nine, such as, for example, six grinding elements 36 a, 40 a, twelve grinding elements 36 a, 40 a or the like. The main body 12 a delimits three suction extraction openings 20 a, the suction extraction openings 20 a, as viewed along a circumferential direction 22 a of the main body 12 a, being in each case arranged between at least two, in particular in each case three, grinding elements 36 a, 40 a of the grinding elements 36 a, 40 a. It is also conceivable, however, for the main body 12 a to delimit a number of suction extraction openings 20 a that is other than three, such as, for example, four, five, six or the like suction extraction openings 20 a. The central axis 24 a of the main body 12 a is realized as an axis of rotational symmetry of the main body 12 a and extends centrally through the connection region 14 a. The central axis 24 a is at least substantially perpendicular to the plane of main extent 17 a of the main body 12 a. In particular, the central axis 24 a is realized as an axis of rotation about which the grinding tool 10 a can be driven in rotation. Preferably, the circumferential direction 22 a is arranged, within the plane of main extent 17 a of the main body 12 a, along a circular path of which the mid-point is located on the central axis 24 a. The connection region 14 a and the contact region 16 a, as viewed in the plane of main extent 17 a of the main body 12 a, are realized in the shape of a circular ring and are centered around the central axis 24 a. In particular in a design of the grinding tool 10 a in which the main body 12 a, in particular the connection region 14 a and/or the contact region 16 a, in particular as viewed in the plane of main extent 17 a of the main body 12 a, has a basic shape that is other than a circular ring, other designs of the circumferential direction 22 a are also conceivable. The main body 12 a has a contact surface 26 a in the contact region 16 a on a side that in particular faces away from the connection region 14 a, the grinding elements 36 a, 40 a being arranged on the contact surface 26 a.

The grinding elements 36 a, 40 a are arranged in groups, in particular symmetrically in groups, distributed around the central axis 24 a, as viewed in the plane of main extent 17 a of the main body 12 a. The suction extraction openings 20 a are arranged in symmetrically distributed manner around the central axis 24 a, as viewed in the lane of main extent 17 a of the main body 12 a. The suction extraction openings 20 a are delimited by inner surfaces 28 a of the main body 12 a which, as viewed in the plane of main extent 17 a of the main body 12 a, span a maximum angular range 98 a around the central axis 24 a, the grinding elements 36 a, 40 a being arranged outside the maximum angular ranges 98 a of the inner surfaces 28 a. The suction extraction openings 20 a delimited by the main body 12 a are preferably all realized identically. The grinding elements 36 a, 40 a are preferably all realized identically. It is also conceivable, however, for the grinding elements 36 a, 40 a and/or the suction extraction openings 20 a to be realized differently.

The grinding elements 36 a, 40 a, as viewed in the plane of main extent 17 a of the main body 12 a, individually have a cross-sectional area 32 a that corresponds to a value from a value range of from 120 mm² to 300 mm3, preferably 170 mm² to 220 mm², particularly preferably 190 mm² to 195 mm², and very particularly preferably 192 mm². The grinding elements 36 a, 40 a, along a longitudinal axis 119 a of the grinding elements 36 a, 40 a, individually have a maximum extent 34 a that corresponds to a value from a value range of, in particular, from 20 mm to 30 mm, preferably 22 mm to 26 mm, particularly preferably 23 mm to 25 mm and very particularly preferably of 24 mm. The grinding elements 36 a, 40 a, at least substantially perpendicular to the longitudinal axes 119 a of the grinding elements 36 a, 40 a, individually have a maximum transverse extent 35 a that corresponds to a value from a value range of, in particular, from 6 mm to 10 mm, preferably 7 mm to 9 mm, particularly preferably 7.5 mm to 8.5 mm and very particularly preferably of 8 mm. Three of the grinding elements 36 a, 40 a are realized as inner grinding elements 36 a, the inner grinding elements 36 a, as viewed in the plane of main extent 17 a of the main body 12 a, being arranged at least substantially completely in an inner edge region 38 a of the contact region 16 a on the main body 12 a that delimits the connection region 14 a. Six of the grinding elements 36 a, 40 a are realized as outer grinding elements 40 a, the outer grinding elements 40 a, as viewed in the plane of main extent 17 a of the main body 12 a, being arranged at least substantially completely in an outer edge region 42 a of the contact region 16 a on the main body 12 a. Preferably, the grinding elements 36 a, 40 a, in particular the outer grinding elements 40 a and the inner grinding elements 16 a, are arranged in such a manner that the longitudinal axes 119 a of the grinding elements 36 a, 40 a have an angle 120 a with respect to a maximum diameter 64 a of the main body 12 a, which in each case passes through a mid-point 117 a of the grinding elements 36 a, 40 a, that corresponds to a value from a value range of, in particular, from 82° to 98°, preferably 85° to 95°, particularly preferably 88° to 92° and very particularly preferably 90°.

In particular, the outer edge region 42 a, preferably as viewed in the plane of main extent 17 a of the main body 12 a, extends within a minimum radial distance 44 a from an outer edge 46 a of the grinding tool 10 a, in particular of the contact region 16 a, the minimum radial distance 44 a corresponding to a value from a value range of, in particular, from 6 mm to 16 mm, preferably 8 mm to 14 mm, particularly preferably 9 mm to 11 mm and very particularly preferably of 10 mm. Preferably, the inner edge region 38 a, preferably as viewed in the plane of main extent 17 a of the main body 12 a, extends within a minimum radial distance 48 a from an inner edge 50 a of the contact region 16 a that delimits the connection region 14 a, the minimum radial distance 48 a corresponding to a value from a value range of, in particular, from 6 mm to 16 mm, preferably 8 mm to 14 mm, more preferably 9 mm to 11 mm and very particularly preferably of 10 mm. The inner grinding elements 36 a, as viewed in the plane of main extent 17 a of the main body 12 a, have a minimum distance 52 a from the central axis 24 a that corresponds to a value from a value range of, in particular, from 35 mm to 50 mm, preferably 40 mm to 45 mm, particularly preferably 41 mm to 43 mm and very particularly preferably of 42 mm. In particular, the outer grinding elements 40 a each have a lateral surface 54 a, the outer grinding elements 40 a being arranged in such a manner that the lateral surfaces 54 a of the outer grinding elements 40 a, as viewed from the central axis 24 a, are arranged in a plane with the outer edge 46 a of the main body 12 a, in particular of the contact region 16 a. The grinding elements 36 a, 40 a of the grinding tool 10 a are realized as diamond grinding elements. The grinding elements 36 a, 40 a each individually comprise a multiplicity of diamond particles 58 a on a side 56 a of the grinding elements 36 a, 40 a that faces away from the contact surface 26 a. Preferably, the grinding elements 36 a, 40 a have a curved shape. The grinding elements 36 a, 40 a, as viewed in the plane of main extent 17 a of the main body 12 a, each have two lateral surfaces 60 a, which are at least substantially rectilinear, the two lateral surfaces 60 a being transverse to the circumferential direction 22 a. The grinding elements 36 a, 40 a, as viewed in the plane of main extent 17 a of the main body 12 a, each have two further lateral surfaces 62 a, which at least partially are at least substantially parallel to the circumferential direction 22 a and transverse to the maximum diameter 64 a of the main body 12 a, in particular of the contact region 16 a. In particular, the further lateral surfaces 62 a, as viewed in the plane of main extent 17 a of the main body 12 a, are at least partially rectilinear and are curved in an edge region of the further lateral surfaces 62 a. However, other designs of the grinding elements 36 a, 40 a are also conceivable.

The suction extraction openings 20 a are arranged at least substantially entirely within the contact region 16 a, as viewed in the plane of main extent 17 a of the main body 12 a. The main body 12 a, in particular the contact region 16 a and the connection region 14 a, are realized in one piece. The main body 12 a delimits, within the connection region 14 a around the central axis 24 a, at least one recess 66 a for fastening the grinding tool 10 a to a grinding tool machine. The recess 66 a delimited by the connection region 14 a, as viewed in the plane of main extent 17 a of the main body 12 a, is realized in the shape of a circular surface. A maximum diameter 68 a of the recess 66 a has a value from a value range of, in particular, from 15 mm to 30 mm, preferably 20 mm to 26 mm, more preferably 22 mm to 24 mm and very particularly preferably of 23 mm. The connection region 14 a has a maximum diameter 70 a corresponding to a value from a value range of, in particular, from 60 mm to 85 mm, preferably 70 mm to 80 mm, particularly preferably 75 mm to 79 mm and very particularly preferably of 77 mm. The contact region 16 a has a maximum radial extent 72 a around the central axis 24 a that corresponds to a value from a value range of, in particular, from 15 mm to 30 mm, preferably 20 mm to 26 mm, particularly preferably 22 mm to 24 mm and very particularly preferably of 23 mm.

The grinding elements 36 a, 40 a are arranged as groups 74 a of grinding elements 36 a, 40 a on the main body 12 a. The groups 74 a of grinding elements 40 a each individually comprise two outer grinding elements 40 a and one inner grinding element 36 a, the two outer grinding elements 40 a of the group 74 a being arranged in the outer edge region 42 a of the contact region 16 a, and the inner grinding element 36 a of the group 74 a being arranged in the inner edge region 38 a of the contact region 16 a that delimits the connection region 14 a, and the inner grinding element 36 a of the group 74 a, as viewed along the circumferential direction 22 a of the main body 12 a, being arranged at least substantially completely between the two outer grinding elements 40 a of the group 74 a. The suction extraction openings 20 a are in each case arranged between two groups 74 a of grinding elements 36 a, 40 a, as viewed along the circumferential direction 22 a of the main body 12 a. Each of the groups 74 a of grinding elements 36 a, 40 a comprises three grinding elements 36 a, 40 a. In particular, the two outer grinding elements 40 a and the inner grinding element 36 a, which in particular are arranged along the circumferential direction 22 a between two of the suction extraction openings 20 a, in each case form a group 74. The grinding tool 10 a has three groups 74 a of grinding elements 36 a, 40 a. A ratio of a minimum distance 75 a of the suction extraction openings 20 a delimited by the main body 12 a from the central axis 24 a of the main body 12 a to a maximum diameter 76 a of the contact region 16 a corresponds to a value from a value range of, in particular, from 0.2 to 0.4, preferably 0.3 to 0.38, more preferably 0.34 to 0.36 and very particularly preferably of 0.35. Preferably, the maximum diameter 76 a of the contact region 16 a corresponds to a value from a value range of, in particular, from 100 mm to 185 mm, preferably 120 mm to 150 mm, particularly preferably 122 mm to 130 mm and very particularly preferably 123 mm, in particular to the maximum diameter 64 a of the main body 12 a. However, other designs of the grinding tool 10 a, in particular of the suction extraction openings 20 a, are also conceivable, for example having a value of the maximum diameter 64 a, 76 a of the main body, in particular of the contact region 16 a, from a value range of from 100 mm to 105 mm, 110 mm to 115 mm, 145 mm to 155 mm or 175 mm to 185 mm. The radial distance 75 a of an inner, in particular innermost, surface 28 a of the main body 12 a, that faces away from the central axis 24 a and delimits a suction extraction opening 20 a, from the central axis 24 a has a value from a value range of, in particular, from 30 mm to 50 mm, preferably 37 mm to 45 mm, particularly preferably 40 mm to 43 mm and very particularly preferably of 42 mm. In particular, a minimum radial distance 75 a from the suction extraction openings 20 a to the central axis 24 a of the main body 12 a is greater than a minimum radial distance 52 a from one of the inner grinding elements 36 a to the central axis 24 a. Preferably, a maximum radial distance 82 a from the suction extraction openings 20 a to the central axis 24 a of the main body 12 a is less than a maximum radial distance 84 a from one of the outer grinding elements 40 a to the central axis 24 a.

A ratio of a maximum longitudinal extent 86 a of the suction extraction openings 20 a delimited by the main body 12 a to the maximum diameter 76 a of the contact region 16 a corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.15 to 0.25, particularly preferably 0.19 to 0.21 and very particularly preferably of 0.2. In particular, the maximum longitudinal extent 86 a of the suction extraction openings 20 a is at least substantially parallel to the plane of main extent 17 a of the main body 12 a. The maximum longitudinal extent 86 a of the suction extraction openings 20 a has a value from a value range of, in particular, from 20 mm to 30 mm, preferably 23 mm to 27 mm, particularly preferably 24 mm to 26 mm and very particularly preferably of 25 mm. The suction extraction openings 20 a, as viewed in the plane of main extent 17 a of the main body 12 a, have a maximum transverse extent 88 a that corresponds to a value from a value range of, in particular, from 10 mm to 14 mm, preferably 11 mm to 13 mm, particularly preferably 11.5 mm to 12.5 mm and very particularly preferably of 12 mm. The maximum transverse extent 88 a is at least substantially parallel to a maximum diameter 64 a, 76 a of the main body 12 a, in particular of the contact region 16 a, and at least substantially perpendicular to the maximum longitudinal extent 86 a of the suction extraction openings 20 a. For example, the suction extraction openings 20 a delimited by the main body 12 a, in particular inner surfaces 28 a of the main body 12 a delimiting the suction extraction openings 20 a, have an at least partially round contour as viewed in the plane of main extent 17 a of the main body 12 a. The contour of the suction extraction openings 20 a delimited by the main body 12 a, in particular of the inner surfaces 28 a of the main body 12 a delimiting the suction extraction openings 20 a, is realized as a as a closed line segment, which comprises two sides that are of equal length and parallel to each other and that in each case are connected at their ends, which in each case are aligned in the same direction, via a semicircular side. In particular, inner surfaces 28 a of the main body 12 a that delimit the suction extraction openings 20 a are at least substantially perpendicular to the plane of main extent 17 a or the main body 12 a or oblique to the plane of main extent 17 a of the main body 12 a. The suction extraction openings 20 a individually have a longitudinal axis 90 a along which the maximum longitudinal extent 86 a is aligned. Preferably, the suction extraction openings 20 a are arranged in such a manner that the longitudinal axis 90 a, in particular as viewed in the plane of main extent 17 a of the main body 12 a, is at least substantially perpendicular to a maximum diameter 64 a, 76 a of the main body 12 a, in particular of the contact region 16 a.

The suction extraction openings 20 a delimited by the main body 12 a, as viewed in the plane of main extent 17 a of the main body 12 a, individually have a cross-sectional area 92 a that corresponds to a value from a value range of, in particular, from 195 mm² to 365 mm², preferably 240 mm² to 300 mm², particularly preferably 260 mm² to 280 mm² and very particularly preferably of 269.1 mm². In particular, a ratio of a total cross-sectional area of the suction extraction openings 20 a, which is formed in particular from a sum of the cross-sectional areas 92 a of the suction extraction openings 20 a, to a total area of the contact surface 26 a corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.16 to 0.26, particularly preferably 0.2 to 0.22 and very particularly preferably of 0.213. Preferably, a ratio of a total cross-sectional area of the suction extraction openings 20 a to a total cross-sectional area of the main body 12 a in the plane of main extent 17 a of the main body 12 a corresponds to a value from a value range of, in particular, from 0.05 to 0.2, preferably 0.1 to 0.15, particularly preferably 1.12 to 0.13 and very particularly preferably 0.124. The cross-sectional areas 92 a of the suction extraction openings 20 a are surrounded, in the plane of main extent 17 a of the main body 12 a, by the inner surfaces 28 a of the main body 12 a that delimit the suction extraction openings 20 a. The cross-sectional areas 92 a of the suction extraction openings 20 a in the plane of main extent 17 a of the main body 12 a individually each have at least one basic shape, which is delineated in particular by the contour of the suction extraction openings 20 a, in particular of the inner surfaces 28 a. The suction extraction openings 20 a delimited by the main body 12 a are arranged in the contact region 16 a and, as viewed in the plane of main extent 17 a of the main body 12 a, extend over in particular 30-70%, preferably 45-55%, particularly preferably 50-54% and very particularly preferably 52.2%, of the maximum radial extent 72 a of the contact region 16 a, in particular from the inner edge 50 a of the contact region 16 a that delimits the connection region 14 a to the outer edge 46 a of the contact region 16 a. The suction extraction openings 20 a delimited by the main body 12 a, as viewed in the plane of main extent 17 a of the main body 12 a, are arranged spaced apart from each other around a central axis 24 a of the main body 12 a over an angular range 96 a, the angular range 96 a extending over, in particular, from 40° to 100°, preferably 70° to 95°, particularly preferably 88° to 95° and very particularly preferably 91°. Preferably, the angular range 98 a spanned by the individual suction extraction openings 20 a extends around the central axis 24 a over, in particular, from 10° to 60°, preferably 20° to 40°, particularly preferably 25° to 30° and very particularly preferably 28.6°.

FIG. 2 shows a cross-section of the grinding tool 10 a that is at least substantially perpendicular to the plane of main extent 17 a of the main body 12 a, in particular the sectional plane shown in FIG. 1. The main body 12 a is at least partially cup-shaped within the connection region 14 a. In particular, in a region 100 a of the connection region 14 a surrounding the recess 66 a delimited by the connection region 14 a, the connection region 14 a is planar. Within the connection region 14 a, the main body 12 a comprises a wall 102 a that is transverse to the contact region 16 a. In particular, the wall 102 a of the main body 12 a has an angle 104 a with respect to the plane of main extent 17 a of the main body 12 a of, in particular, from 30° to 80°, preferably 50° to 80°, more preferably 70° to 78° and very particularly preferably 75.2°. The main body 12 a has, preferably within the contact region 16 a, in particular at least substantially perpendicular to the plane or main extent 17 a of the main body 12 a, a maximum thickness 106 a that corresponds to a value from a value range of, in particular, from 1 mm to 10 mm, preferably 2 mm to 6 mm, particularly preferably 3 mm to 5 mm and very particularly preferably of 4 mm. The grinding elements 36 a, 40 a, at least substantially parallel to the central axis 24 a, individually have a maximum thickness 108 a that corresponds to a value from a value range of, in particular, from 1 mm to 10 mm, preferably 2 mm to 7 mm, particularly preferably 4 mm to 6 mm and very particularly preferably of 5 mm.

FIGS. 3 to 10 show further exemplary embodiments of the invention. The descriptions and the drawings that follow are limited substantially to the differences between the exemplary embodiments, and in principle reference may also be made to the drawings and/or the description of the other exemplary embodiments, in particular of FIGS. 1 and 2, in respect of components that have the same designation, in particular in respect of components denoted by the same references. To distinguish the exemplary embodiments, the letter a has been appended to the references of the exemplary embodiment in FIG. 1. In the exemplary embodiments of FIGS. 2 to 8, the letter a is replaced by the letters b to h.

FIG. 3 shows a first alternative design of a grinding tool 10 b realized as a diamond cup wheel, in a plan view. The grinding tool 10 b has a main body 12 b comprising a connection region 14 b and a contact region 16 b. The contact region 16 b at least substantially completely surrounds the connection region 14 b as viewed in at least one plane of main extent 17 b of the main body 12 b. The grinding tool 10 b has twelve grinding elements 36 b, 40 b arranged on the main body 12 b. It is also conceivable, however, for the grinding tool 10 b to have a number of grinding elements 36 b, 40 b that is other than twelve. The main body 12 b delimits four suction extraction openings 20 b which, as viewed along a circumferential direction 22 b of the main body 12 b, are arranged in each case between at least two, in particular in each case three, of the grinding elements 36 b, 40 b. It is also conceivable, however, for the main body 12 b to delimit a number of suction extraction openings 20 b that is other than four. The grinding tool 10 b represented in FIG. 3 is of a design that is at least substantially similar to the grinding tool 10 a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10 b represented in FIG. 3. In contrast to the grinding tool 10 a described in the description of FIGS. 1 and 2, the grinding tool 10 b represented in FIG. 3 preferably has four suction extraction openings 20 b and four groups 74 b of grinding elements 36 b, 40 b, each group 74 b of grinding elements 36 b, 40 b comprising two outer grinding elements 40 b and one inner grinding element 36 b. The inner grinding element 36 b of an individual group 74 b is arranged at least partially between the two outer grinding elements 40 b of the group 74 b as viewed along a circumferential direction 22 b. The grinding elements 36 b, 40 b and the suction extraction openings 20 b are preferably realized in respect of their dimensions, in the plane of main extent 17 b of the main body 12 b, in a manner identical to the grinding elements 36 a, 40 a and the suction extraction openings 20 a of the grinding tool 10 a described in FIGS. 1 and 2. The suction extraction openings 20 b delimited by the main body 12 b, as viewed in the plane of main extent 17 b of the main body 12 b, are arranged spaced apart from each other around a central axis 24 b of the main body 12 b over an angular range 96 b of, in particular, from 30° to 90°, preferably 50° to 70°, particularly preferably 58° to 65° and very particularly preferably 61.4°. Preferably, an angular range 98 b spanned by the individual suction extraction openings 20 b extends around the central axis 24 b over, in particular, from 10° to 50°, preferably 20° to 40°, more preferably 25° to 32° and very particularly preferably 28.6°. In particular, a ratio of a total cross-sectional area of the suction extraction openings 20 b, which is formed in particular from a sum of the cross-sectional areas 92 b of the suction extraction openings 20 b, to a total area of the contact surface 26 b corresponds to a value from a value range of, in particular, from 0.1 to 0.5, preferably 0.22 to 0.38, particularly preferably 0.28 to 0.32 and very particularly preferably 0.306. Preferably, a ratio of a total cross-sectional area of the suction extraction openings 20 b to a total cross-sectional area of the main body 12 b in the plane of main extent 17 b of the main body 12 b corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.15 to 0.2, particularly preferably 0.17 to 0.18 and very particularly preferably 0.173.

FIG. 4 shows a cross-section of the grinding tool 10 b that is at least substantially perpendicular to the plane of main extent 17 b of the main body 12 b, in particular the sectional plane shown in FIG. 3.

FIG. 5 shows a second alternative design of a grinding tool 10 c realized as a diamond cup wheel, in a plan view. The grinding tool 10 c has a main body 12 c comprising a connection region 14 c and a contact region 16 c. The contact region 16 c surrounds the connection region 14 c at least substantially completely as viewed in at least one plane of main extent 17 c of the main body 12 c. The grinding tool 10 c has nine grinding elements 40 c, 110 c arranged on the main body 12 c. It is also conceivable, however, for the grinding tool 10 c to have a number of grinding elements 40 c, 110 c that is other than nine.

The main body 12 c delimits three suction extraction openings 20 c which, as viewed along a circumferential direction 22 c of the main body 12 c, are in each case arranged between at least two, in particular in each case three, of the grinding elements 40 c, 110 c. It is also conceivable, however, for the main body 12 c to delimit a number of suction extraction openings 20 c that is other than three. The grinding tool 10 c represented in FIG. 5 is of a design that is at least substantially similar to the grinding tool 10 a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10 c represented in FIG. 5. In contrast to the grinding tool 10 a described in the description of FIGS. 1 and 2, the grinding tool 10 c represented in FIG. 5 preferably has three radial grinding elements 110 c and six outer grinding elements 40 c. The radial grinding elements 110 c each have a longitudinal axis 112 c that is at least substantially parallel to a maximum diameter 64 c, 76 c of the main body 12 c, in particular of the contact region 16 c. The radial grinding element 110 c is arranged in such a manner that the longitudinal axis 112 c of the radial grinding element 110 c is at least substantially parallel to a transverse axis 113 c and/or a maximum diameter 64 c, 76 c or the main body 12 c, in particular of the contact region 16 c, the transverse axis 113 c intersecting the central axis 24 c of the main body 12 c. In particular, the longitudinal axes 112 c of the radial grinding elements 110 c intersect at a point on a central axis 24 c of the main body 12 c. Preferably, the longitudinal axes 112 c of the radial grinding elements 110 c are at least substantially perpendicular to the circumferential direction 22 c and/or transverse to a longitudinal axis 114 c of one of the outer grinding elements 40 c that forms part of the same group 74 c of grinding elements 40 c, 110 c as the radial grinding element 110 c, respectively. The radial grinding elements 110 c are arranged at least partially within an outer edge region 42 c and an inner edge region 38 c of the contact region 16 c on the main body 12 c. The radial grinding elements 110 c have a maximum radial extent 116 c that is greater than a maximum radial extent 118 c of the suction extraction openings 20 c, in particular along a maximum diameter 64 c, 76 c of the main body 12 c, particularly of the contact region 16 c. The grinding elements 40 c, 110 c of the grinding tool 10 c form three groups 74 c of grinding elements 40 c, 110 c, each group 74 c comprising two outer grinding elements 40 c and one radial grinding element 110 c. The radial grinding element 110 c of an individual group 74 c of grinding elements 40 c, 110 c, as viewed along the circumferential direction 22 c, is in each case arranged between the two outer grinding elements 40 c of the group 74 c. The radial grinding elements 110 c are preferably realized with respect to dimensions of the grinding elements 40 c, 110 c, in the plane of main extent 17 c of the main body 12 c, in a manner identical to the outer grinding elements 40 c, and preferably differ only in an arrangement on the main body 12 c. Also conceivable, however, are other designs of the grinding tool 10 c, in particular of the radial grinding elements 110 c, for example with a different arrangement of the radial grinding elements 110 c relative to the suction extraction openings 20 c.

FIG. 6 shows a third alternative design of a grinding tool 10 d realized as a diamond cup wheel, in a plan view. The grinding tool 10 d has a main body 12 d comprising a connection region 14 d and a contact region 16 d. The contact region 16 d surrounds the connection region 14 d at least substantially completely as viewed in at least one plane of main extent 17 d of the main body 12 d. The grinding tool 10 d comprises eight grinding elements 36 d, 40 d arranged on the main body 12 d. It is also conceivable, however, for the grinding tool 10 d to have a number of grinding elements 36 d, 40 d that is other than eight. The main body 12 d delimits four suction extraction openings 20 d which, as viewed along a circumferential direction 22 d of the main body 12 d, are in each case arranged at least partially between at least two, in particular in each case two, of the grinding elements 36 d, 40 d. It is also conceivable, however, for the main body 12 d to delimit a number of suction extraction openings 20 d that is other than four. The grinding tool 10 d represented in FIG. 6 is of a design that is at least substantially similar to the grinding tool 10 a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool ltd represented in FIG. 6. In contrast to the grinding tool 10 a described in the description of FIGS. 1 and 2, the grinding tool 10 d represented in FIG. 6 preferably has four groups 74 d of grinding elements 36 d, 40 d that in each case are arranged between two of the suction extraction openings 20 d. The grinding elements 36 d, 40 d are preferably realized in respect of their dimensions, in the plane of main extent 17 d of the main body 12 d, in a manner identical to the grinding elements 36 a, 40 a of the grinding tool 10 a described in FIGS. 1 and 2. Each of the groups 74 d of grinding elements 36 d, 40 d comprises an outer grinding element 40 d and an inner grinding element 36 d, the inner grinding element 36 d being transverse to the circumferential direction 22 d and to a maximum diameter 64 d, 76 d of the main body 12 d, in particular of the contact region 16 d. The inner grinding element 36 d is arranged, in particular, at least partially within an inner edge region 38 d of the contact region 16 d. The inner grinding element 36 d has a longitudinal axis 119 d that has an angle 120 d of, in particular, from 30° to 82°, preferably 50° to 85°, more preferably 65° to 75° and very particularly preferably 70°, with respect to an axis 124 d of the main body 12 d that passes through a mid-point 117 d of the inner grinding element 36 d and along a maximum diameter 64 d, 76 d of the main body 12 d, in particular of the contact region 16 d. The outer grinding element 40 d, as viewed in the plane of main extent 17 d of the main body 12 d, is arranged spaced apart from an outer edge 46 d of the main body 12 d and/or of the contact region 16 d within an outer edge region 42 d of the contact region 16 d, the outer edge region 42 d, preferably as viewed in the plane of main extent 17 d of the main body 12 d, extending within a minimum radial distance 44 d that has a value from a value range of, in particular, from 8 mm to 20 mm, preferably 10 mm to 18 mm, particularly preferably 13 mm to 15 mm and very particularly preferably of 14 mm, from the outer edge 46 d of the grinding tool 10 d, in particular of the contact region 16 d. In particular, the outer grinding elements 40 d have a maximum distance 122 d from the outer edge 46 d that has a value from a value range of, in particular, from 0.5 mm to 5 mm, preferably 1 mm to 3 mm, particularly preferably 1.5 m to 2.5 mm and very particularly preferably of 2 mm. The suction extraction openings 20 d are arranged in such a manner that a longitudinal axis 90 d of the suction extraction openings 20 d has an angle 123 d of, in particular, from 30° to 82°, preferably 50° to 75°, particularly preferably 64° to 68° and very particularly preferably 66°, with respect to an axis 125 d of the main body 12 d that passes through a mid-point 121 d of the suction extraction openings 20 d and along a maximum diameter 64 d, 76 d of the main body 12 d, in particular of the contact region 16 d. Preferably, the longitudinal axes 90 d of the suction extraction openings 20 d extend along major semi-axes of the ellipsoidal cross-sectional areas 92 d of the suction extraction openings 20 d. In particular, the suction extraction openings 20 d are arranged, in respect of an arrangement relative to the circumferential direction 22 d, like the inner grinding elements 36 d. Along their longitudinal axes 90 d, the suction extraction openings 20 d each have a maximum longitudinal extent 86 d that has a value from a value range of, in particular, from 10 mm to 50 mm, preferably 20° to 40 mm, particularly preferably 28 mm to 32 mm and very particularly preferably of 30 mm. In particular, the suction extraction openings 20 d each individually have an ellipsoidal cross-sectional area 92 d that corresponds to a value from a value range of, in particular, from 180 mm² to 500 mm², preferably 300 mm² to 350 mm², particularly preferably 320 mm² to 340 mm² and very particularly preferably of 330 mm². The suction extraction openings 20 d have, in particular at least substantially perpendicular to their longitudinal axes 90 d, a maximum transverse extent 88 d corresponding to a value from a value range of, in particular, from 10 mm to 22 mm, preferably 12 mm to 18 mm, particularly preferably 13 mm to 15 mm and very particularly preferably of 14 mm. The suction extraction openings 20 d delimited by the main body 12 d are arranged spaced apart from each other around the central axis 24 d of the main body 12 d, as viewed in the plane of main extent 17 d of the main body 12 d, over an angular range 96 d of, in particular, from 30° to 80°, preferably 40° to 60°, particularly preferably 45° to 50° and very particularly preferably 47°. Preferably, an angular range 98 d spanned by the individual suction extraction openings 20 d extends around the central axis 24 d over, in particular, from 30° to 60°, preferably 40° to 55°, particularly preferably 47° to 51° and very particularly preferably 49°.

FIG. 7 shows a fourth alternative design of a grinding tool 10 e realized as a diamond cup wheel, in a plan view. The grinding tool 10 e has a main body 12 e comprising a connection region 14 e and a contact region 16 e. The contact region 16 e surrounds the connection region 14 e at least substantially completely as viewed in at least one plane of main extent 17 e of the main body 12 e. The grinding tool 10 e comprises twelve grinding elements 36 e, 40 e, 126 e arranged on the main body 12 e. It is also conceivable, however, for the grinding tool 10 e to have a number of grinding elements 36 e, 40 e, 126 e that is other than twelve. The main body 12 e delimits four suction extraction openings 20 e which, as viewed along a circumferential direction 22 e of the main body 12 e, are in each case arranged at least partially between at least two, in particular in each case three, of the grinding elements 36 e, 40 e, 126 e. It is also conceivable, however, for the main body 12 e to delimit a number of suction extraction openings 20 e that is other than four. The grinding tool 10 e represented in FIG. 7 is of a design that is at least substantially similar to the grinding tool 10 a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10 e represented in FIG. 7. In contrast to the grinding tool 10 a described in the description of FIGS. 1 and 2, the grinding tool 10 e represented in FIG. 7 preferably has four groups 74 e of grinding elements 36 e, 40 e, 126 e that in each case are arranged between two of the suction extraction openings 20 e. The grinding elements 36 e, 40 e, 126 e are preferably realized in respect of their dimensions, in the plane of main extent 17 e of the main body 12 e, in a manner identical to the grinding elements 36 a, 40 a of the grinding tool 10 a described in FIGS. 1 and 2. Each of the groups 74 e of grinding elements 36 e, 40 e, 126 e comprises an outer grinding element 40 e, an inner grinding element 36 e and a middle grinding element 126 e. The middle grinding element 126 e is arranged outside an outer edge region 42 e of the contact region 16 e and outside an inner edge region 38 e of the contact region 16 e on the contact region 16 e, in particular on a contact surface 26 e, of the main body 12 e. In particular, along a maximum diameter 64 e, 76 e of the main body 12 e, in particular of the contact region 16 e, the middle grinding element 126 e has a minimum distance 128 e from an outer edge 46 e of the main body 12 e, in particular of the contact region 16 e, that corresponds to a value from a value range of, in particular, from 8 mm to 20 mm, preferably 10 mm to 16 mm, particularly preferably 12 mm to 14 mm and very particularly preferably of 13 mm. The middle grinding element 126 e is at least substantially perpendicular to a maximum diameter 64 e, 76 e of the main body 12 e, in particular of the contact region 16 e. The outer grinding element 40 e, as viewed in the plane of main extent 17 e of the main body 12 e, is arranged spaced apart from an outer edge 46 e of the main body 12 e and/or of the contact region 16 e within an outer edge region 42 e of the contact region 16 e, the outer edge region 42 e, preferably as viewed in the plane of main extent 17 e of the main body 12 e, extending within a minimum radial distance 44 e that has a value from a value range of, in particular, from 8 mm to 20 mm, preferably 10 mm to 16 mm, particularly preferably 13 mm to 15 mm and very particularly preferably of 14 mm, from the outer edge 46 d of the grinding tool 10 d, in particular of the contact region 16 d. In particular, the outer grinding elements 40 d have a maximum distance 122 e from the outer edge 46 e that corresponds to a value from a value range of, in particular, from 0.5 mm to 5 mm, preferably 1 mm to 4 mm, particularly preferably 1.5 mm to 2.5 mm and very particularly preferably of 2 mm. The grinding elements 36 e, 40 e, 126 e of the individual groups 74 e of grinding elements 36 e, 40 e, 126 e are arranged in a mutually staggered manner, in particular the middle grinding element 126 e of a group 74 e being offset in the circumferential direction 22 e with respect to the outer grinding element 40 e of the group 74 e, and the inner grinding element 36 e of the group 74 e being offset in the circumferential direction 22 e with respect to the middle grinding element 126 e. In particular, the middle grinding element 126 e is arranged at least partially between the inner grinding element 36 e and the outer grinding element 40 e as viewed in the plane of main extent 17 e of the main body 12 e. The suction extraction openings 20 e are each arranged in such a manner that a longitudinal axis 90 e of one of the suction extraction openings 20 e has an angle 123 e of, in particular, from 30° to 82°, preferably 50° to 70°, particularly preferably 58° to 62° and very particularly preferably 60°, with respect to an axis 125 e of the main body 12 e that passes through a mid-point 121 e of the suction extraction opening 20 e and along a maximum diameter 64 e, 76 e of the main body 12 e, in particular of the contact region 16 e. The suction extraction openings 20 e each have along their longitudinal axes 90 e a maximum longitudinal extent 86 e corresponding to a value from a value range of, in particular, from 10 mm to 50 mm, preferably 20 mm to 40 mm, more preferably 28 mm to 32 mm and very particularly preferably of 30 mm. In particular, the suction extraction openings 20 e have an ellipsoidal cross-sectional area 92 e that corresponds to a value from a value range of, in particular, from 180 mm² to 500 mm², preferably 250 mm² to 360 mm², particularly preferably 300 mm² to 310 mm² and very particularly preferably of 306 mm². The suction extraction openings 20 e have, in particular at least substantially perpendicular to their longitudinal axes 90 e, a maximum transverse extent 88 e that corresponds to a value from a value range of, in particular, from 5 mm to 30 mm, preferably 10 mm to 20 mm, particularly preferably 12 mm to 14 mm and very particularly preferably of 13 mm.

FIG. 8 shows a fifth alternative design of a grinding tool 10 f realized as a diamond cup wheel, in a plan view. The grinding tool 10 f has a main body 12 f comprising a connection region 14 f and a contact region 16 f. The contact region 16 f surrounds the connection region 14 f at least substantially completely as viewed in at least one plane of main extent 17 f of the main body 12 f. The grinding tool 10 f has twelve grinding elements 36 f, 40 f, 126 f arranged on the main body 12 f. It is also conceivable, however, for the grinding tool 10 f to have a number of grinding elements 36 f, 40 f, 126 f that is other than twelve. The main body 12 f delimits three suction extraction openings 20 f which, as viewed along a circumferential direction 22 f of the main body 12 f, are in each case arranged at least partially between at least two, in particular in each case four, of the grinding elements 36 f, 40 f, 126 f. It is also conceivable, however, for the main body 12 f to delimit a number of suction extraction openings 20 f that is other than three. The grinding tool 10 f represented in FIG. 8 is of a design that is at least substantially similar to the grinding tool 10 a described in the description of FIGS. 1 and 2, such that reference maybe made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10 f represented in FIG. 8. In contrast to the grinding tool 10 a described in the description of FIGS. 1 and 2, the grinding tool 10 f represented in FIG. 8 preferably has three groups 74 f of grinding elements 36 f, 40 f, 126 f, each group 74 f comprising four grinding elements 36 f, 40 f, 126 f. The grinding elements 36 f, 40 f, 126 f and the suction extraction openings 20 f are preferably realized in respect of their dimensions, in the plane of main extent 17 f of the main body 12 f, in a manner identical to the grinding elements 36 a, 40 a and to the suction extraction openings 20 a of the grinding tool 10 a described in FIGS. 1 and 2. Each group 74 f of grinding elements 36 f, 40 f, 126 f comprises two outer grinding elements 40 f, one inner grinding element 36 f and one middle grinding element 126 f. In particular, the inner grinding element 36 f and the middle grinding element 126 f, as viewed in the plane of main extent 17 f of the main body 12 f, are arranged at least partially between the two outer grinding elements 40 f along the circumferential direction 22 f. The middle grinding element 126 f is arranged, outside an outer edge region 42 f of the contact region 16 f and outside an inner edge region 38 f of the contact region 16 f, on the contact region 16 f, in particular on a contact surface 26 f, of the main body 12 f. The middle grinding element 126 f is at least substantially perpendicular to a maximum diameter 64 f, 76 f of the main body 12 f, in particular of the contact region 16 f. In particular, along a maximum diameter 64 f, 76 f of the main body 12 f, in particular of the contact region 16 f, the middle grinding element 126 f has a minimum distance 128 f from an outer edge 46 f of the main body 12 f, in particular of the contact region 16 f, that corresponds to a value from a value range of, in particular, from 8 mm to 30 mm, preferably 10 mm to 20 mm, particularly preferably 12 mm to 14 mm and very particularly preferably 13 mm. The inner grinding element 36 f, as viewed in the plane of main extent 17 f of the main body 12 f, is arranged, along the circumferential direction 22 f, between the middle grinding element 126 f and one of the two outer grinding, elements 40 f.

FIG. 9 shows a sixth alternative design of a diamond cup wheel grinding tool 10 g, in a plan view. The grinding tool 10 g has a main body 12 g comprising a connection region 14 g and a contact region 16 g. The contact region 16 g surrounds the connection region 14 g at least substantially completely as viewed in at least one plane of main extent 17 g of the main body 12 g. The grinding tool 10 g has fifteen grinding elements 36 g, 40 g arranged on the main body 12 g. It is also conceivable, however, for the grinding tool 10 g to have a number of grinding elements 36 g, 40 g that is other than fifteen. The main body 12 g delimits five suction extraction openings 20 g which, as viewed along a circumferential direction 22 a, of the main body 12 g, are in each case arranged at least partially between at least two, preferably in each case three, of the grinding elements 36 g, 40 g. It is also conceivable, however, for the main body 12 g to delimit a number of suction extraction openings 20 g that is other than five. The grinding tool 10 g represented in FIG. 9 is of a design that is at least substantially similar to the grinding tool 10 a described in the description of FIGS. 1 and 2, such that reference maybe made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10 g represented in FIG. 9. In contrast to the grinding tool 10 a described in the description of FIGS. 1 and 2, the grinding tool 10 g represented in FIG. 9 preferably has five groups 74 g of grinding elements 36 g, 40 g that in each case are arranged between two of the five suction extraction openings 20 g. In particular, each group 74 g comprises three grinding elements 36 g, 40 g. The grinding elements 36 g, 40 g are preferably realized in respect of their dimensions, in the plane of main extent 17 g of the main body 12 g, in a manner identical to the grinding elements 36 g, 40 g and to the suction extraction openings 20 a of the grinding tool 10 a described FIGS. 1 and 2. Each group 74 g individually comprises two outer grinding elements 40 g and an inner grinding element 36 g that is transverse to the circumferential direction 22 g and to a maximum diameter 64 g, 76 g of the main body 12 g, in particular of the contact region 16 g. In particular, the inner grinding element 36 g is arranged at least partially within an inner edge region 38 g of the contact region 16 g. The inner grinding element 36 g has a longitudinal axis 119 g which has an angle 120 g of, in particular, from 30° to 70°, preferably 40° to 60°, more preferably 50° to 54° and very particularly preferably 52°, with respect to an axis 124 g of the main body 12 g that passes through a mid-point 117 g of the inner grinding element 36 g and along a maximum diameter 64 g, 76 g of the main body 12 g, in particular of the contact region 16 g. The suction extraction openings 20 g delimited by the main body 12 g have a longitudinal axis 90 g that is at least substantially parallel to a maximum diameter 64 g, 76 g of the main body 12 g, in particular of the contact region 16 g. In particular, the suction extraction openings 20 g extend from the inner edge region 38 g, in particular an inner edge 50 g of the contact region 16 g that delimits the connection region 14 g, at least substantially over a maximum radial extent 72 g of the contact region 16 g into the outer edge region 42 g. Along their longitudinal axes 90 g, the suction extraction openings 20 g each have a maximum longitudinal extent 86 g corresponding to a value from a value range of, in particular, from 10 mm to 40 mm, preferably 15 mm to 30 mm, more preferably 18 mm to 22 mm and very particularly preferably of 20 mm. In particular, the suction extraction openings 20 g have an ellipsoidal cross-sectional area 92 g that corresponds to a value from a value range of, in particular, from 180 mm² to 400 mm², preferably 200 mm² to 300 mm², particularly preferably 220 mm² to 235 mm3 particularly preferably of 228 mm².

The suction extraction openings 20 g have, in particular at least substantially perpendicular to their longitudinal axes 90 g, a maximum transverse extent 88 g that corresponds to a value from a value range of, in particular, from 5 mm to 30 mm, preferably 10 mm to 20 mm, particularly preferably 13.5 mm to 15.5 mm and very particularly preferably of 14.5 mm. The suction extraction openings 20 g delimited by the main body 12 g, as viewed in the plane of main extent 17 g of the main body 12 g, are arranged spaced apart from each other around the central axis 24 g of the main body 12 g over an angular range 96 g of, in particular, from 30° to 60°, preferably 40° to 50°, particularly preferably 43° to 47° and very particularly preferably 45°. Preferably, an angular range 98 g spanned by the individual suction extraction openings 20 g extends around the central axis 24 g over, in particular, from 10° to 40°, preferably 20° to 30°, more preferably 22° to 26° and very particularly preferably 24°. The suction extraction openings 20 g delimited by the main body 12 g are arranged in the contact region 16 g and, as viewed in the plane of main extent 17 g of the main body 12 g, extend over at least 60%, preferably at least 70%, more preferably at least 80° and very particularly preferably 83%, of a maximum radial extent 72 g of the contact region 16 g, in particular from the inner edge 50 g of the contact region 16 g that delimits the connection region 14 a to an outer edge 46 g of the contact region 16 g. In particular, a ratio of a total cross-sectional area of the suction extraction openings 20 g, which is formed in particular from a sum of the cross-sectional areas 92 g of the suction extraction openings 20 g, to a total area of a contact surface 26 g of the contact region 16 g corresponds to a value from a value range of, in particular, from 0.15 to 0.5, preferably 0.3 to 0.4, particularly preferably 0.32 to 0.34 and very particularly preferably 0.33. Preferably, a ratio of a total cross-sectional area of the suction extraction openings 20 g, to a total cross-sectional area of the main body 12 g in the plane of main extent 17 g of the main body 12 g corresponds to a value from a value range of, in particular, from 0.1 to 0.3, preferably 0.15 to 0.25, particularly preferably 0.17 to 0.19 and very particularly preferably 0.18.

FIG. 10 shows a seventh alternative design of a grinding tool 10 h realized as a diamond cup wheel, in a plan view. The grinding tool 10 h has a main body 12 h comprising a connection region 14 h and a contact region 16 h. The contact region 16 h at least substantially completely surrounds the connection region 14 h as viewed in at least one plane of main extent 17 h of the main body 12 h. The grinding tool 10 h has fifteen grinding elements 36 h, 40 h, 130 h, 132 h arranged on the main body 12 h. It is also conceivable, however, for the grinding tool 10 h to have a number of grinding elements 36 h, 40 h, 130 h, 132 h that is other than fifteen. The main body 12 h delimits three suction extraction openings 20 h which, as viewed along a circumferential direction 22 h of the main body 12 h, are in each case arranged at least partially between at least two, preferably in each case five, of the grinding elements 36 h, 40 h, 130 h, 132 h. It is also conceivable, however, for the main body 12 h to delimit a number of suction extraction openings 20 h that is other than three. The grinding tool 10 h represented in FIG. 10 is of a design that is at least substantially similar to the grinding tool 10 a described in the description of FIGS. 1 and 2, such that reference may be made, at least substantially, to the description of FIGS. 1 and 2 with respect to a design of the grinding tool 10 h represented in FIG. 10. In contrast to the grinding tool 10 a described in the description of FIGS. 1 and 2, the grinding tool 10 h represented in FIG. 10 preferably has three groups 74 h of grinding elements 36 h, 40 h, 130 h, 132 h that in each case are arranged between two of the three suction extraction openings 20 h. The grinding elements 36 h, 40 h, 130 h, 132 h and the suction extraction openings 20 h are preferably realized in respect of their dimensions, in the plane of main extent 17 h of the main body 12 h, in a manner to the grinding elements 36 a, 40 a and to the suction extraction openings 20 a of the grinding tool 10 a realized as described in FIGS. 1 and 2. In particular, each group 74 h comprises five grinding elements 36 h, 40 h, 130 h, 132 h. Each group 74 h of grinding elements 36 h, 40 h, 130 h, 132 h individually comprises two outer grinding elements 40 h, an inner grinding element 36 h, a further outer grinding element 130 h that is transverse to the circumferential direction 22 h and a further inner grinding element 132 h that is transverse to the circumferential direction 22 h. The further inner grinding element 132 h is in particular arranged at least partially within an inner edge region 38 h of the contact region 16 h. The further outer grinding element 130 h is in particular arranged at least partially within an outer edge region 42 h of the contact region 16 h. The further inner grinding elements 132 h each have a longitudinal axis 134 h, which has an angle 120 h of, in particular, from 40° to 82°, preferably 50° to 70°, particularly preferably 62° to 66° and very particularly preferably 64°, with respect to an axis 124 h of the main body 12 h that passes through a mid-point 117 h of the further inner grinding element 132 h and along a maximum diameter 64 h, 76 h of the main body 12 h, in particular of the contact region 16 h. The further outer grinding elements 130 h each have a longitudinal axis 136 h, which has an angle 142 h of, in particular, from 40° to 82°, preferably 50° to 70°, particularly preferably 60° to 64° and very particularly preferably 62°, with respect to an axis 138 h of the main body 12 h that passes through a mid-point 140 h of the further outer grinding element 130 h and along a maximum diameter 64 h, 76 h of the main body 12 h, in particular of the contact region 16 h. The further inner grinding element 132 h and the further outer grinding element 130 h are arranged in such a manner that the longitudinal axes 134 h, 136 h of the further inner grinding element 132 h and of the further outer grinding element 130 h span an angle 144 h of, in particular, from 8° to 50°, preferably 20° to 40°, particularly preferably 28° to 32° and very particularly preferably 30°. The inner grinding element 36 h, the further inner grinding element 132 h and the further outer grinding element 130 h, as viewed in the plane of main extent 17 h of the main body 12 h, are arranged along the circumferential direction 22 h at least partially between the two outer grinding elements 40 h. The further outer grinding element 130 h, as viewed along the plane of main extent 17 h of the main body 12 h, is arranged along the circumferential direction 22 h at least substantially completely between the further inner grinding element 132 h and one of the outer grinding elements 40 h. In particular, the inner grinding elements 36 h each have a longitudinal axis 148 h, which has an angle 152 h of, in particular, from 60° to 90°, preferably 70° to 68°, particularly preferably 82° to 86° and very particularly preferably 84°, with respect to an axis 150 h of the main body 12 h that passes through the mid-point 146 h of the inner grinding element 130 h and along a maximum diameter 64 h, 76 h of the main body 12 h, in particular of the contact region 16 h. 

1. A grinding tool comprising: at least one main body that comprises at least one connection region and at least one contact region, which at least substantially completely surrounds the connection region as viewed in at least one plane of main extent of the main body; and a multiplicity of grinding elements arranged on the main body, wherein the main body delimits a multiplicity of suction extraction openings, each of which is arranged between at least two grinding elements of the multiplicity of grinding elements along a circumferential direction of the main body.
 2. The grinding tool as claimed in claim 1, wherein: the multiplicity of grinding elements are arranged as groups of grinding elements on the main body, and each of the multiplicity of suction extraction openings is arranged between two groups of grinding elements as viewed along the circumferential direction of the main body.
 3. The grinding tool as claimed in claim 1, wherein a ratio of a minimum distance of the suction extraction openings from a central axis of the main body to a maximum diameter of the contact region is at least 0.05.
 4. The grinding tool as claimed in claim 1, wherein that a ratio of a maximum longitudinal extent of the suction extraction openings to a maximum diameter of the contact region is at most 0.9.
 5. The grinding tool as claimed in claim 1, wherein each of the multiplicity of suction extraction openings, as viewed in the plane of main extent of the main body has a cross-sectional area of at least 195 mm².
 6. The grinding tool as claimed in claim 1, wherein the multiplicity of suction extraction openings includes at most five suction extraction openings.
 7. The grinding tool as claimed in claim 1, wherein the multiplicity of suction extraction openings are arranged in the contact region and, as viewed in the plane of main extent of the main body, extend over at least 30% of a maximum radial extent of the contact region from a side of the contact region that delimits the connection region to an outer edge of the contact region.
 8. The grinding tool as claimed in claim 1, wherein the suction extraction openings, as viewed in the plane of main extent of the main body, are arranged spaced apart from each other around a central axis over an angular range of at least 45°.
 9. The grinding tool as claimed in claim 2, wherein at least one individual group of the groups of grinding elements comprises at most five grinding elements.
 10. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements has at least one inner grinding element arranged in an inner edge region of the contact region on the main body delimiting the connection region, and a maximum of six inner grinding elements are arranged on the main body.
 11. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements comprises at least one outer grinding element arranged in an outer edge region of the contact region on the main body, and a maximum of six outer grinding elements are arranged on the main body.
 12. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements comprises at least two outer grinding elements and at least one inner grinding element, the at least two outer grinding elements are arranged in an outer edge region of the contact region and the at least one inner grinding element is arranged in an inner edge region of the contact region that delimits the connection region, and the inner grinding element, as viewed along the circumferential direction of the main body, is arranged between two outer grinding elements.
 13. The grinding tool as claimed in claim 2, wherein: at least one individual group of the groups of grinding elements comprises at least one radial grinding element, which is arranged in such a manner that a longitudinal axis of the radial grinding element is at least substantially parallel to a transverse axis of the main body, and the transverse axis intersects a central axis of the main body.
 14. The grinding tool as claimed in claim 1, wherein the grinding tool is a diamond cup wheel. 